The Monogahela River Bridge, Section 51H, Brownsville, Pennsylvania


High above the Monongahela River Valley, the new concrete segmental Monongahela River Bridge (Fig. 1) for the Pennsylvania Turnpike Commission provides a new link for commerce in the Keystone state. The bridge is the state’s third vehicular concrete segmental bridge, and was bid as an alternate design before the bid, saving the owner $8.5 million over the as-designed steel structure.

The concrete segmental design eliminated two piers and moved two others, resulting in long, open spans. Balanced cantilever construction from above was used to protect the environment as well as to allow river, rail and vehicular traffic below the bridge to keep moving during construction. The main span across the river is 518' long to provide a 425' navigation clearance and rises 200' above the valley. At the dedication event on August 2, 2012, the state’s Senator called the bridge a “pathway to the future.”

The Pennsylvania Turnpike Commission’s bridge was built by Walsh Construction with bridge design by FIGG. The bridge opened to traffic July 16, 2012.

Project Details




Pennsylvania Turnpike Commission

Owner’s Engineers:




Alternate Design Team:


Contractor Engineering Services:


Construction Engineering Inspection:

SAI Consulting Engineers, FINLEY Engineering Group, Inc.

Form Travelers for Cast-in-Place Segments:


Formwork for Piers and Cast-in-Place Segments:


Post-Tensioning Materials:




Prepackaged Grout:


Bridge Resources